Adjustable incandescent-lamp holder



(No Model.)

B. WADE. ADJUSTABLE INGANDESGENT LAMP HOLDER.

No. 557,732. PatentedApr. '7 1896.

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ANDREN EGRAHANL FHUTULFMQWASHINGWNDL NiTEn STATES PATENT OFFIcE.

EDWARD TVADE, OF LAWRENCE, MASSACHUSETTS.

ADJUSTABLE INCANDESCENT-LAMP HOLDER.

SPECIFICATION forming part of Letters Patent No. 557,732, dated April 7,1896.

Application filed July 1, 1895. Serial No. 554,551. (No model.\

To all whont it 772mg concern.-

Be it known that I, EDWARD \VADE, of Lawrence, in the county of Essexand State of lvlassachusetts, have invented certain new and usefulImprovements in Adjustable Incandescent-Lamp Holders, of which thefollowing is a specification.

This invention has for its object to provide a simple, durable, andeffective adjustable holder adapted to be secured to a fixed support andto be adjusted to a variety of positions and retained by friction inanyposition to which it may be adjusted.

The invention consists in the improved con struction which I will nowproceed to describe and claim.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a side elevation of my improved lamp-holder. Fig. 2represents a similar elevation from another point of view. Fig. 3represents a section on line 3 3 of Fig. 2. Fig. 4 represents a sectionon line at l of Fig. 2.

The same letters of reference indicate the same parts in all thefigures.

In the drawings, a represents a tubular holder or bracket adapted to beattached to a suitable support, such as a wall or ceiling.

Y) represents a rod which is fitted to turn in said bracket and extendsupwardly into a chamber a in said bracket, where it is provided with acollar 1), supported by a spring 0, located in said chamber, said springexerting endwise pressure on the rod a in the direction indicated by thearrow in Fig. 3, and thus causing frictional contact between a pin 1/affixed to the rod and a portion of the lower end of the bracket a, saidfrictional contact being sufficient to retain the rod against looseswinging movement in either direction, and therefore enabling thebracket and rod to be placed horizontally, as when the bracket isaffixed to a vertical wall. The lower portion of the bracket a has atongue or projection a at one side of the pin 11 said projectionextending across the path of the pin 11 and constituting a stop whichlimits the rotary movement of the rod in the bracket.

(Z represents an internally-threaded screw which is screwed upon thethreaded lower end of the rod l), and is formed in one piece with aspring-contained chamber (1' and arms projecting downwardly from thechamber d. 6 represents a plate having a segmental edge c, said platebeing pivoted at e to the lower portions of the arms (P. On the plate 6is formed a downwardly-projecting screw= threaded socket e into which isscrewed the threaded end of a rod f. The plate 6 is located between thearms d (Z and its segmental edge e is engaged with a brake-shoe g,formed on or attached to the rod or stud g, which is fitted to slide inthe socket d. A spring g inserted in the socket d presses the shoe gdownwardly upon the segmental edge of the plate 6-. Said shoe has aconcave face fitting the convex edge e of the plate 6, said face havinga covering g of leather or other comparatively yielding material. Theshoe is kept constantly pressed by the spring g against the plate 6,said spring and the yielding coverin g compensating for the wear of thecontacting-surfaces, and enabling the brake to hold the plate 6 and armf at any angle to which they may be adjusted.

1' represents a slide which is fitted to move upon the rod f, and issplit at i to form two branches or divisions, connected by a clamping-screw i which, when tightened, binds the slide 2' firmly upon therodf. hen the screw is loosened, it releases the slide 1' and permits itto move freely upon the rod.

One end of the slide '2' is provided with a transverse orifice, throughwhich passes abolt j having a hollow or socket head j, in which isinserted a lamp-supporting arm 70. The bolt j is screw-threaded in itsinner end, and with its screw-threaded portion is engaged a nut j havinga handle j". Said nut bears against the slide 2, and when tighteneddraws the arm is closely against the opposite side of the slide 2', thusbinding said arm tightly against the slide and holding it at any angleto which it may have been adjusted by the rotation of the bolt j in theslide 7 while the nut 7' was loosened. The outer end of the arm A: isadapted to be engaged in any suitable way with an incandescent-lampsocket m.

It will be seen that the described construction permits the followingadjustments of the lamp:

First. The rotary connection of the rod Z) to the bracket to enables thelamp to be swung through an arc of which the rod 1) is the center, thespring 0 and pin Z9 and the lower end of the bracket a constitutingmeansfor preventing the loose turning of the rod 1).

Second. The pivotal connection of the plate e and arm f to the arms (Z dwhich are rigidly attached to the rod 1), enables the lamp to be swungin an arc of which the pivot c is the center, the yieldingly-supportedbrake g, holding the lamp at any position to which it may be swung insaid are.

Third. The rod f and slide 2' permit the lamp to be adjusted vertically,or toward and from the pivot 6 Fourth. The pivotal connection of thelamp- 7 arm 70 to the slide 2' enables the lamp to swing in an arc ofwhich the bolt is the center.

Fifth. The sliding connection afforded by the socket j and lamp-arm itenables the lamp to be moved toward and from the bolt or stud j, the nutj securing the lamp-arm to the slide i in any of the positions to whichthe lamp-arm may be adjusted.

I claim An electric-la mp holder comprising a bracket or socket adaptedfor attachment to an elevated support, a vertical rod 1) fitted at itsupper end to rotate in said socket, a rod f pivotally connected with thelower portion of the rod 1), frictional holding means whereby the rod fmay be retained at any angle to which it may be turned on the pivot thatconnects it with the rod 1), said means including a segmental plateattached to one of said rods and a spring-pressed brake supported by theother rod and bearing on said plate, an adjustable slide ion the rod f,provided with clamping devices whereby it may be secured to the rod atvarious heights, a lamp-arm holderjadapted to be rotated in the slide 2and provided with clamping means whereby it may be secured to the slidein any position towhich it may be adjusted and the lampholding arm 7;supported by said holder and longitudinally adjustable therein, the saidarm and the lamp. thereon being capable of the various adjustmentsproduced as follows, viz., first by the rotation of the rod 1) in thesocket or bracket, secondly by the swinging movement of the rod f on thepivot that connects it with the rod 1), thirdly by the vertical movementof the slide '11 on the rod f, fourthly by the rotary movement of thelamp-arm holder j in the slide 2 and fifthly by the longitudinalmovement of the lamparm in the holder j.

I11 testimony whereof I have signed my name to this specification, inpresence of two subscribing witnesses, this 27th day of June, A. D.1895.

EDXVARD XVADE.

lVitnesses:

O. F. BROWN, A. D. HARRISON.

